You can rent time on computers at the local copy center for a $7 setup charge and an additional $4 for every 5 minutes. How much time can you rent for $16

11.25 minutes

Step-by-step explanation:

Let x = number of 5 minute portions

7 + 4x = 16

⇒ 4x = 9

⇒ x = 2.25

So 2.25 x 5 = 11.25 minutes

  or  

step-by-step explanation:

if the four friends split the cost, p, of the pizza evenly, then each friend pays one-fourth of the cost of the pizza.

the expression is   or